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Voltammetric Determination of Hg(2+), Zn(2+), and Pb(2+) Ions Using a PEDOT/NTA-Modified Electrode

[Image: see text] A novel electrochemical sensor for determining trace levels of Hg(2+), Pb(2+), and Zn(2+) ions in water using square wave voltammetry (SWV) is reported. The sensor is based on a platinum electrode (Pt) modified by poly(3,4-ethylenedioxythiophene) and N(α),N(α)-bis-(carboxymethyl)-l...

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Autores principales: Alshawi, Jasim M. S., Mohammed, Mohammed Q., Alesary, Hasan F., Ismail, Hani K., Barton, Stephen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9202299/
https://www.ncbi.nlm.nih.gov/pubmed/35722009
http://dx.doi.org/10.1021/acsomega.2c02682
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author Alshawi, Jasim M. S.
Mohammed, Mohammed Q.
Alesary, Hasan F.
Ismail, Hani K.
Barton, Stephen
author_facet Alshawi, Jasim M. S.
Mohammed, Mohammed Q.
Alesary, Hasan F.
Ismail, Hani K.
Barton, Stephen
author_sort Alshawi, Jasim M. S.
collection PubMed
description [Image: see text] A novel electrochemical sensor for determining trace levels of Hg(2+), Pb(2+), and Zn(2+) ions in water using square wave voltammetry (SWV) is reported. The sensor is based on a platinum electrode (Pt) modified by poly(3,4-ethylenedioxythiophene) and N(α),N(α)-bis-(carboxymethyl)-l-lysine hydrate (NTA lysine) PEDOT/NTA. The modified electrode surface (PEDOT/NTA) was prepared via the introduction of the lysine-NTA group to a PEDOT/N-hydroxyphthalimide NHP electrode. The (PEDOT/NTA) was characterized via cyclic voltammetry (CV), Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM). The effects of scan rates on the electrochemical properties of the polymer electrode were also investigated. The electrochemical results were used to estimate the coverage of the electrode polymer surface and its electrostability in background electrolyte solutions. Several analytical parameters, such as polymer film thickness, metal deposition time, and pH of the electrolyte, were examined. Linear responses to Hg(2+), Pb(2+), and Zn(2+) ions in the concentration range of 5–100 μg L(–1) were obtained. The limits of detection (LODs) for the determination of Hg(2+), Pb(2+), and Zn(2+) ions were 1.73, 2.33, and 1.99 μg L(–1), respectively. These promising results revealed that modified PEDOT/NTA films might well represent an important addition to existing electrochemical sensor technologies.
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spelling pubmed-92022992022-06-17 Voltammetric Determination of Hg(2+), Zn(2+), and Pb(2+) Ions Using a PEDOT/NTA-Modified Electrode Alshawi, Jasim M. S. Mohammed, Mohammed Q. Alesary, Hasan F. Ismail, Hani K. Barton, Stephen ACS Omega [Image: see text] A novel electrochemical sensor for determining trace levels of Hg(2+), Pb(2+), and Zn(2+) ions in water using square wave voltammetry (SWV) is reported. The sensor is based on a platinum electrode (Pt) modified by poly(3,4-ethylenedioxythiophene) and N(α),N(α)-bis-(carboxymethyl)-l-lysine hydrate (NTA lysine) PEDOT/NTA. The modified electrode surface (PEDOT/NTA) was prepared via the introduction of the lysine-NTA group to a PEDOT/N-hydroxyphthalimide NHP electrode. The (PEDOT/NTA) was characterized via cyclic voltammetry (CV), Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM). The effects of scan rates on the electrochemical properties of the polymer electrode were also investigated. The electrochemical results were used to estimate the coverage of the electrode polymer surface and its electrostability in background electrolyte solutions. Several analytical parameters, such as polymer film thickness, metal deposition time, and pH of the electrolyte, were examined. Linear responses to Hg(2+), Pb(2+), and Zn(2+) ions in the concentration range of 5–100 μg L(–1) were obtained. The limits of detection (LODs) for the determination of Hg(2+), Pb(2+), and Zn(2+) ions were 1.73, 2.33, and 1.99 μg L(–1), respectively. These promising results revealed that modified PEDOT/NTA films might well represent an important addition to existing electrochemical sensor technologies. American Chemical Society 2022-06-01 /pmc/articles/PMC9202299/ /pubmed/35722009 http://dx.doi.org/10.1021/acsomega.2c02682 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Alshawi, Jasim M. S.
Mohammed, Mohammed Q.
Alesary, Hasan F.
Ismail, Hani K.
Barton, Stephen
Voltammetric Determination of Hg(2+), Zn(2+), and Pb(2+) Ions Using a PEDOT/NTA-Modified Electrode
title Voltammetric Determination of Hg(2+), Zn(2+), and Pb(2+) Ions Using a PEDOT/NTA-Modified Electrode
title_full Voltammetric Determination of Hg(2+), Zn(2+), and Pb(2+) Ions Using a PEDOT/NTA-Modified Electrode
title_fullStr Voltammetric Determination of Hg(2+), Zn(2+), and Pb(2+) Ions Using a PEDOT/NTA-Modified Electrode
title_full_unstemmed Voltammetric Determination of Hg(2+), Zn(2+), and Pb(2+) Ions Using a PEDOT/NTA-Modified Electrode
title_short Voltammetric Determination of Hg(2+), Zn(2+), and Pb(2+) Ions Using a PEDOT/NTA-Modified Electrode
title_sort voltammetric determination of hg(2+), zn(2+), and pb(2+) ions using a pedot/nta-modified electrode
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9202299/
https://www.ncbi.nlm.nih.gov/pubmed/35722009
http://dx.doi.org/10.1021/acsomega.2c02682
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